I used to think that planting trees was the only solution to desertification. But after watching this I realised I was wrong. Cattle can be used to reclaim land, making it possible to grow crops on what was semi-arid land.
Restoring different environments requires different approaches. Anyone who really cares about the environment should consider all the approaches in this playlist. See here.
Some attempts to save the environment do more harm than good. Solar panels on buildings is a good thing, but when they destroy vast areas of vegetation, they are not.
According to WHO (the World Health Organisation), 7 million people die annually from air pollution. That is one reason why some climate scientists are beginning to re-examine nuclear.
We must weigh up the costs of using nuclear power against the cost of not using it. See James Hansen & Michael Shellenberger: Nuclear Power? Are Renewables Enough? 1
It will be men like Elon Musk who save the environment, not government programs.
If you want to see how effective the government is at taking care of the environment, watch The Planet of the Humans.
Innovation is the key to solving environmental problems. There is a high demand for environmentally friendly products; we must let the free market do its thing. If you destroy the economy through high taxes and over regulation2 you will destroy innovation, and with it, the environment. See The Government Against the Economy.
1. Some environmentalists believe that we should be less concerned about carbon dioxide and more concerned about other pollutants, as carbon dioxide helps plant growth. See Dr Patrick Moore on Carbon Dioxide and Plant Growth.
2. Some regulation is necessary.